Fountain drawing pen



Feb. 5, 1957 J. G. MoRAN r-:TAL

FOUNTAIN DRAWING PEN 2 Sheets-Sheet l Filed 001'.. 27, 1952 Ivz/erzrza'aa ralf. L maa/0. Josep .7ar'aw.

- Feb. 5, 1957 J. G. MoRAN ET AL 2,780,203

FOUNTAIN DRAWING PEN Filed Oct. 27, 1952 2 Sheets-Sheet 2 3 La/e2?fors.' cazfd E lacado mztfosej 6:' l/ofajz FOUNTAIN DRAWING PEN JosephG. Moran and Richard E. Lucado, Chicago, Ill.

Application October 27, 1952, Serial No. 316,962

7 Claims. (Cl, 1Z0-47) This invention pertains to drafting or drawingpens and more particularly to such a pen equipped with a reservoir for amore or less continuous supply of ink and mechanism whereby the pen usermay control the flow of ink from the reservoir to the pen or pen bladepoints or nibs.

One of the principal objects of the invention is to provide a safe andsure arrangement whereby ink from a reservoir in the pen may bepositively fed to the pen blade points in such quantity and at such timeas desired and otherwise under the complete control and at the will ofthe user.

Another principal object is to provide a reservoir or fountain pen ofsuch construction that the reservoir may be quickly, easily and safelyrelled and such that the danger of accidental flow or leakage of inkfrom the pen is reduced to a minimum 4if not completely eliminated, theconstruction also providing for easy cleaning.

Still another important object is to provide a safe and positive meansfor depositing ink on or between the pen blade points or nibs, thedelivery means providing a closed channel to the place or area where theink must be delivered or deposited for effective use thereby also toreduce premature drying of the ink.

Many other objects as well as the advantages and uses of the inventionwill become apparent after reading the following description and claimsand after viewing the drawings in which: t

Fig. l is a view partly in longitudinal section of a ruling or draftingpen embodying a presently preferred form of the invention, the partsbeing illustrated as they appear at the time the pen reservoir has beenemptied and the pen is being readied for lling;

Fig. 2 is a view in longitudinal section of the same pen, the sectionbeing taken at right angles to or 90 displaced from the section of Fig.l and illustrating the parts in positions assumed after a portion of theink has been displaced from the reservoir;

Fig. 3 is a large scale longitudinal sectional v-iew corresponding tothat of Fig. 1 but showing the parts in their positions with the plungeradvanced part way toward the discharge end; and

Figs. 4 and 5, respectively, are transverse sectional views takensubstantially along the section lines 4 4 and 5 5 of Fig. 3 looking inthe direction of the arrows.

In the embodiment illustrated the pen has a two part cylindrical bodycomposed of a tubular barrel member 3 providing an ink reservoir theinternal bore or wall 4 of which is cylindrical and a housing 5 coaxialwith the barrel 3 and removably secured thereto as by threads 6. Aninternal circumferentially extending por-tion 7 of housing 5 provides ashoulder abutment 8 at one side for the adjacent end of barrel 3 and ashoulder abutment 9 at the opposite side for the forward end of a coiledspring 10. The internal siu'face or bore of portion 7 is cylindrical andin mating registry with the bore 4 of barrel 3 for the reception of acylindrical plunger generally designatedl 11 which is mounted in thesebores with a sliding mired States Patent O Mice tit for movements backand forth between ends of the reservoir provided by the barrel 3. At itsforward yend the plunger V11 may be provided with a suitable packingring or circular gasket 12 held in place by a cap member 13 havingthreaded connection with a threaded boss 14 on that end of the plunger,thereby to maintain a liquid tight sliding t between the plunger and thereservoir walls.

The rear end of plunger 11 has an outwardly directed circumferentialange 15 which not only provides an abutment for the rearward end ofspring but also serves as a guide or bearing for the plunger since ithas sliding .engagement with the cylindrical bore 16 of housing 5 as theplunger is moved back and forth in the barrel 3. The spring 10 is connedin the circumferential recess formed between the outer surface ofplunger 11 and the bore 16 of the housing 5, rests at its ends againstthe abutment surfaces or shoulders formed by portion 7 and ange andnormally urges the plunger out of the reservoir or toward the rightviewing Figs. 1 and 2, Fig. l illustrating the positions of these partswhen the plunger is at its extreme rearward position. A slot 17 extendsthrough the plunger 11 from side to side on a diameter and is of alength between its opposite rounded ends equal to the distance overwhich the plunger is to travel. A pin 18 extending through the oppositesides of housing 5 and through the slot 17 and releasably or removablysecured to the housing, not only acts as a stop to limit the plungertravel in each direction but prevents the plunger from rotating withinthe barrel and housing.

The rear end of the plunger is also counter-bored and `tapped asindicated at 19 for mating engagement with a thread 20 on a stem 21. Ifdesired a pin 22 may extend into transversely drilled registering holesin the plunger and stem to provide added security against rotation ordisplacement of stem 21 relative to plunger 11. The rear end of stem 21may be equipped with a cap 23 for ease of linger manipulation. Stem 21passes through and normally has threaded engagement with a thread in asplit nut the complementary halves of which are designated 24, 24. Thesplit nut is mounted in the rear end of the housing 5 for rotationrelative thereto and to such end has a circumferential groove 25 (onehalf in each half of the nut) in which a two-part or split collar 26 isrotatably mounted and normally retained by an embracing spring ring 27.The split collar 26 has threaded con nection, as indicated at 28, withthe rear end of housing 5 and has a circumferentially extending radialflange by which it may be gripped whenever lit is desirable to unscrewit from the housing thereby to remove the split nut. Between the inneror forward end of the split nut and a shoulder 29 in housing 5 is awasher 30.

The halves of the split nut have complementary internal recesses 31 forthe reception of a spring ring 32 which normally tends to spread the nuthalves apart to the positions shown lin Fig. 1 while projectingport-ions 33 carry complementary parts ot' an external thread engageableby a mating internal thread in a cap 34 which when in place holds thesplit nut halves together. When the split nut halves are held togetherby the cap 34 or otherwise, the internal thread thereof is engaged withthe mating thread of the stem 21 so that upon relative rotation betweenthe split nut and stem, the stem will be caused -to travel in one axialdirection or the other and, in turn,

- will cause the plunger to be moved in the barrel in a correspondingdirection. Of course upon release of the split nut halves 24, 24', itwill be spread to the position shown in Fig. 1, thereby releasing thethread of stem 21 whereupon spring 10 will move the plunger to the rightto the limit of its path of travel in that direction as determined bythe engagement of pin 13 with the forward or left hand end of slot 17,as shown in Fig. 1.

The forward end of barrel 4 is counter-bored and mouth part 35 of aneedle outlet tube 36 and the adjacent reduced and threaded end of aferrule 37. Internal threads at the opposite end of ferrule 37 engageexternal threads on the base 38 of the pen proper the blades of which,designated 39, 39', are integral with the base 38, The needle tuber36passes through an aperture centrally located through the base 38 and hasits outer or delivery end disposed just back of the working tips of theblades at approximately the normal place of application of ink when inkis applied by the usual quill. As usual, one blade, that designated 39,is relatively stationary while the other, 39', is resilient over aportion of,` its length for adjustment toward and from blade 39 throughthe screw and clamp indicated at 4i).

While the operation of the pen to feed inkA from the reservoir and torefill theV reservoir after exhaustion of the ink therefrom are more orless obvious, they will be briefly described. Rotation of the split nut24, 24 and cap 34 together relative to the barrel will cause the stem 21to move the plunger 11 in one direction or the other depending upon thedirection of rotation of cap and split nut and whether the stem threadis left or right hand. Of course, the arrangement will be such that theoperator or user will be able readily to determine the proper directionof rotation to effect ink displacement. Thel advance of the plunger intothe reservoir displaces the inl; therefrom into the needle tube andthence to the space between the pen blades. If for some reason, such asfor refilling the reservoir, the cap 34 is removed and the split nutpermitted to spread or open, the stem thread will be disengaged from thesplit nut'whereupon the spring will force the plunger out of thereservoir and the stem back as indicated in Fig. l. In order now torefill the reservoir it is preferable to remove the blades by unscrewingthe base 38 from ferrule 37 and to insert the needle tube point in thebottle or other ink supply the plunger then being or previously havingbeen depressed into the reservoir by pressing the finger against cap 23to urge the stem 21 through the spread halves of the split nut. The stemis then released and the upward or outward movement of the plunger fromthe reservoir will draw ink into the reservoir through the needle tubewhereupon the split nut halves may bepressed together, the cap 34reassembled in hplace and the pen blades reconnected with the ferrule37.

Many variations in construction and arrangement of the form describedmay be effected and the invention may be embodied in other formsas willbe appreciated. Accordingly we desire that the invention be consideredas limited only by its spirit and the scope of the appended claims.

We claim:

1. In a fountain pen a barrel providing a cylindrical reservoir chamberfor ink and having an ink outlet at one end of the reservoir chamber, aplunger having an end removably mounted in the said chamber and movabletherein axially thereof toward said outlet end for expelling ink throughsaid outlet, means normally urging said plunger away from said outletend toward the opposite end of the chamber, an externally threaded stemnon-rotatably sec-ured to said plunger for movement therewith, means forsecuring said stem against rotation relative to said barrel, aninternally threaded split nut secured to said barrel for rotationrelative thereto and normally held against displacement'therefrom, theinternal thread of said nut mating with saidthread of said stem, meansnormally tending to open said split nut to effect disengagement of thethread thereof from the thread of said stern, and releasable means forretaining the said nut thread in operative engagement with said stemthread.

2. In a fountain pen a barrel providing a cylindrical reservoir chamberfor ink and having an ink outlet at one end of the reservoir chamber, aplunger disposed in the said chamber and slidably movable thereinaxially thereoftowardsaid outlet end for expelling ink through saidoutlet, spring means normally urging said plunger axially of the chamberaway from said outlet end toward the opposite end thereof, an externallythreaded stem non-rotatably connected with said plunger for movementstherewith, means for securing said plunger against rotation relative tosaid barrel, an internally threaded split nut secured relative to saidbarrel for rotation relative thereto and normally held againstdisplacement longitudinally thereof, the internal thread of said nutmating with said thread of said stem, means normally tending to openSaid split nut to effect disengagement of the thread thereof from thethread of said stem, and releasable means for retaining the said nutthread in operative engagement with said stem thread.

3. In a fountain pen a barrel providing a reservoir chamber for ink andhaving an ink outlet at one end of the reservoir chamber, a plungerconformably fitting within said chamber and movable therein axiallythereof toward said outlet endl for expelling ink through said outlet,means normally urging said plunger away from said outlet end toward theopposite end `of the chamber, an externally/,threaded stem connectedwith said plunger for movements therewith axially of said chamber, meansfor securing said stem against rotation relative to said barrel, aninternally threaded split nut secured to said barrel for rotationrelative thereto and against movements axially thereof, the internalthread of said nut mating with said thread of said stem, means normallytending to open said split nut to effect disengagement of the threadthereof from the thread to said stern, and releasable means forretaining the said nut thread in operative engagement with said stemthread.

4. In a fountain pen a barrel providing a reservoir chamber for ink andhaving an ink outlet at one end of the reservoir chamber, a plungerconformably fitting within said chamber and movable therein axiallythereof toward. said outlet end for expelling ink through said outlet,spring means reacting between said barrel and plunger normally urgingsaid plunger away from said outlet end toward the opposite end of thechamber, an externally threaded stern connected with said plunger formovements therewith axially of said chamber, means for securing saidstern and plunger against rotation relative to said barrel, aninternally threaded split nut secured to said barrel for rotationrelative thereto and normally against displacement therefrom, theinternal thread of said nut mating with said thread of said stem, meansnormally tending to open said split nut to effect disengagement of thethread thereof from the thread of said stem, and releasable means forretaining the said nut thread in operative engagement with said stemthread.

5. In a fountain pen, means providing a cylindrical reservoir having anoutlet at one end, a plunger slidably mounted in said reservoir forreciprocal movements axially thereof, spring means reacting between saidreservoir means and plunger and constantly urging said plunger away fromthe outlet end and toward the opposite end of the reservoir, a threadedmember secured to said plunger, means carried by and rotatable relativeto said reservoir means and releasably engaged with the thread of saidthreaded member for advancing said plunger toward said outlet endagainst the action of said spring, and manually operable means forreleasing said rotatable means from the thread of said threaded memberwhereby said plunger' may be moved away from said outlet end by theaction of said spring.

6. In a fountain pen, a hollow barrel providing an ink reservoir andhaving a discharge outlet at one end, a plunger mounted in said barrelfor coaxial reciprocation therein, spring means constantly urging saidplunger away from the discharge end toward the opposite end of saidbarrel, means including interengageable and disengageable threadedmembers one of which is carried by the plunger and the other of which iscarried by the barrel for feeding said plunger toward the discharge endof said barrel against the action of said spring, and manually operablemeans for selectively engaging and disengaging the threads of saidmembers. l

7. In a fountain pen, a hollow barrel providing an ink reservoir andhaving an outlet therefrom at one end, a plunger slidably butnon-rotatably mounted in said barrel for coaxial reciprocation therein,spring means constantly urging said plunger toward the opposite end ofsaid barrel, a threaded element carried by said plunger, a threadedelement carried by said barrel and releasably engageable with androtatable relative to the threaded 5 bers.

References Cited in the tile of this patent UNITED STATES PATENTSOConnor Nov. 22, 1949 FOREIGN PATENTS 169,423 Great Britain May 8, 1922

